Speaker
Description
Accurate nuclear data are essential for simulations of new types of reactors and to deepen our understanding of the cosmos. The nuclear density-functional theory (DFT) has been developed to provide high accuracy binding energies and bulk properties of nuclei all over the nuclear chart. The quest to move from bulk properties to detailed spectroscopic information and reaction observables presents a challenge for the theory community. Overcoming the challenges involves development of improved formalism [1] and efficient methods [2] to make the connection from DFT to a fully quantal description of the nucleus. Our approach is based on employing a low-energy effective Hamiltonian that captures the response of an underlying energy density functional to external fields [2]. The resulting many-body problem is then solved using symmetry restoration in combination with the Generator-Coordinate method (GCM), using a procedure that allows it to account for both collective and single-particle excitations. This combination of low-energy interactions and GCM is a versatile many–body framework capable of describing both light and superheavy deformed nuclei [3,4]. The nuclear structure part have been integrated with dynamics within a consistent framework, enabling predictive simulations of neutron cross sections across a wide range of isotopes [5]. In this talk I discuss the recent progress of this line of research.
1. B.G. Carlsson and J. Rotureau, Phys. Rev. Lett. 126, 172501 (2021)
2. J. Ljungberg, B.G. Carlsson, J. Rotureau, A. Idini and I. Ragnarsson, Phys. Rev. C 106, 014314 (2022)
3. A. Såmark-Roth et al., Phys. Rev. Lett. 126, 032503 (2021).
4. J. Ljungberg et al., J. Phys.: Conf. Ser. 2586, 012081 (2023).
5. J. Boström , J. Rotureau , B.G. Carlsson , A. Idini, Phys. Rev. C 112, L051602 (2025)